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Mars April 20

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#1 idp

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Posted 21 April 2010 - 03:43 PM

Well it was actually April 19 in Bethany (CT), but April 20, 01:41ut. Mars at 7.9" is getting more and more difficult, but a few albedo features (albeit a bit fuzzy) were still visible in the 10" Clark refractore. Seeing was average, I used a W23A filter and 500x for the albedo spots, no filter and 335x for the rest. Bright spots over Tharsis and Moab/Eden, and a faint bright cloud seemed to stretch across the planet. Raw sketch this time, no colors.

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#2 idp

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Posted 21 April 2010 - 03:45 PM


I also have the habit to record intensity estimates, using the BAA scale (0=polar cap, 10=black background sky)

Ivano

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#3 frank5817

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Posted 22 April 2010 - 09:59 AM

Ivano,

Beautifully done. It is getting tough now to bring in Mars. You did a great job here.

Frank :)

#4 Jef De Wit

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Posted 22 April 2010 - 10:51 AM

Wow, that's a lot of detail. Nice sketch!

#5 dweller25

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Posted 22 April 2010 - 12:02 PM

Great drawing, I would love to look through a big refractor.

#6 CarlosEH

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Posted 23 April 2010 - 02:55 AM

Ivano,

An excellent observation of Mars. You have captured a cloud band extending between Eden (preceding limb) to Tharsis (following limb) over Chryse-Xanthe. I have labeled the major albedo features visible. Thank you for sharing it with us all.

Carlos

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#7 rerun

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Posted 23 April 2010 - 07:36 AM

Hallo Ivano,

great sketch of Mars.You saw very many details ,that must be a fine scope,you use.

CS

Markus






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